.footer{
    background-color: #f2f2f2;
    padding: 10px;
    text-align: center;
    overflow: hidden;
}
.footer-nav ul{
    list-style-type:none;
    padding: 0;
}
.footer-nav ul li{
    display: inline-block;
    margin-right: 10px;
}
.footer-nav ul li a{
    text-decoration: none;
    color: #333;
}

/* 版权 */
.footer-info {
    margin: 10px 0;
}
.footer-info p{
    font-size: 12px;
    color: #888;
}
/* 链接 */
.footer-social ul{
    list-style-type: none;
    padding: 0;
}
.footer-social ul li {
    display: inline-block;
    margin-right: 5px;
}
.footer-social ul li a{
    text-decoration: none;
    color: #333;
    font-size: 19px;
}

/* 联系人 */
.footer-contact p{
    font-size: 12px;
    color: #888;
    margin: 5px 0;
}
/* 返回 */
.footer-back-to-top a{
    text-decoration: none;
    color: 333;
    font-size: 12px;
}
.footer-back-to-top a:hover{
    text-decoration: underline;
}   
.footer-foot{
    font-size: 12px;
}